Kasada is a bot management and fraud-prevention SaaS that detects and mitigates automated web and mobile attacks (credential stuffing, scraping, account takeover). It uses behavioral signals, device/browser intelligence and traffic controls to block malicious bots and allow legitimate traffic.
SafeLine is a self-hosted Web Application Firewall (WAF) and reverse proxy that defends web apps from SQL injection, XSS, bot abuse, and DDoS using ML-powered threat detection and configurable policies.
22.4k stars1.5k forksGPL-3.0last commit Actively maintained
Lightweight, self-hostable CAPTCHA alternative using SHA-256 proof-of-work challenges to protect forms and APIs from bots without tracking or visual puzzles.
7.6k stars551 forkslast commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 2 shipped a commit in the last six months. Licences in this list: GPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Network Security (VPN, Firewall, WAF).
